Consider again the skateboarder in Figure P6.39. (a) Assuming she starts at the top of t...

Consider again the skateboarder in Figure P6.39. (a) Assuming she starts at the top of the half-pipe, make qualitative sketches of her kinetic energy and potential energy as a function of x in the half-pipe. Start your plots when she is at the far left in Figure P6.39 and end them when she reaches the far right. Also assume friction is negligible and ignore the kinetic energy of the wheels. (b) Repeat part (a), but now assume friction is not negligible.